Sarlak, Ahmad, Mohammadtalebi, Mitra, Mohammadtalebi, Bahareh (2017). The Effect of Liquidity and Credit Risk on the Relationship be-tween Business Activities and Fluctuations in the Price of all Com-panies Listed on the Tehran Stock Exchange. *Advances in Mathematical Finance and Applications*, 2(1), 69-81. 10.22034/amfa.2017.529062